EP 2373057 B1 20200226 - PIEZOELECTRIC SPEAKER, PIEZOELECTRIC AUDIO DEVICE EMPLOYING PIEZOELECTRIC SPEAKER, AND SENSOR WITH ALERT DEVICE ATTACHED
Title (en)
PIEZOELECTRIC SPEAKER, PIEZOELECTRIC AUDIO DEVICE EMPLOYING PIEZOELECTRIC SPEAKER, AND SENSOR WITH ALERT DEVICE ATTACHED
Title (de)
PIEZOELEKTRISCHER LAUTSPRECHER, PIEZOELEKTRISCHE TONVORRICHTUNG MIT DEM PIEZOELEKTRISCHEN LAUTSPRECHER UND SENSOR MIT ANGESCHLOSSENEM ALARMGERÄT
Title (fr)
HAUT-PARLEUR PIÉZOÉLECTRIQUE, DISPOSITIF AUDIO PIÉZOÉLECTRIQUE UTILISANT LE HAUT-PARLEUR PIÉZOÉLECTRIQUE, ET CAPTEUR POURVU D'UN DISPOSITIF D'ALERTE FIXÉ
Publication
Application
Priority
- JP 2009071550 W 20091225
- JP 2008334854 A 20081226
- JP 2008334872 A 20081226
- JP 2009246392 A 20091027
Abstract (en)
[origin: EP2373057A1] A piezoelectric speaker having a high sound pressure level in a low-frequency domain and a high-frequency domain, a piezoelectric audio device, and a sensor with an alert device attached employing the piezoelectric speaker are provided. A piezoelectric speaker 1 of the invention includes a piezoelectric vibrator 2 including a piezoelectric body 21 formed of a piezoelectric element and a plate-shaped body (plate) which has a larger diameter than the piezoelectric body 21 and which is attached to a surface of the piezoelectric body 21 in a concentric form, and a film-shaped body 3 that is provided around the piezoelectric vibrator 2 so as to elastically hold the piezoelectric vibrator. The film-shaped body 3 has a coarse and dense portion in a circumferential direction thereof, which has a physically coarse portion, and which can become a mountain portion 3M or a valley portion 3V or both, and is disposed so as to correspond to a natural frequency of an in-phase mode wherein antinodes and nodes are formed in a concentric form. The piezoelectric vibrator 2 and the film-shaped body 3 form a sound producing body.
IPC 8 full level
H04R 17/00 (2006.01); H04R 17/10 (2006.01); H04R 1/34 (2006.01); H04R 7/04 (2006.01); H04R 7/20 (2006.01)
CPC (source: EP US)
H04R 17/00 (2013.01 - EP US); H04R 17/10 (2013.01 - EP US); H04R 1/345 (2013.01 - EP US); H04R 7/04 (2013.01 - EP US); H04R 7/20 (2013.01 - EP US); H04R 2231/003 (2013.01 - EP US); H04R 2307/207 (2013.01 - EP US)
Citation (examination)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
EP 2373057 A1 20111005; EP 2373057 A4 20130828; EP 2373057 B1 20200226; CA 2748252 A1 20100701; CA 2748252 C 20140527; CN 102265646 A 20111130; CN 102265646 B 20140423; US 2011255718 A1 20111020; US 9031265 B2 20150512; WO 2010074206 A1 20100701
DOCDB simple family (application)
EP 09835002 A 20091225; CA 2748252 A 20091225; CN 200980152807 A 20091225; JP 2009071550 W 20091225; US 200913142003 A 20091225